I liked Dan’s cam suggestion. Not to darn shabby Dan. A wide LSA for a smooth idle on a more aggressive lobe while not being far off from a friendly driver with mileage.
Its duration is a step above standards command lots of lift for how well OEM ports flow. It stays under .500 for an easy going valve spring.
Dan! FABO might just make a motor head out of you yet!
But a lot has to be answered for the OP by the OP.